This is the horrifying moment a hitman casually walked into a restaurant in Peru and shot dead a former gang member.

David Socrates Cortijo Torres, 29, was known by Peruvian law enforcement authorities to have been an ex-ranking member of a local criminal organization called ‘Los Destructores’ (The Destroyers).

But he appeared to have given up his life of crime and was enjoying a meal out with his girlfriend a Chinese restaurant in San Juan de Lurigancho, a district in Lima, Peru, when he was shot in the back of the head.

Surveillance video footage from Chinese restaurant obtained by Diario Correo shows the moment the gunman slowly walks into the site and covertly pulls out his weapon from the front pocket of his hooded sweatshirt on Sunday just before midnight.

WARNING GRAPHIC IMAGES

David Socrates Cortijo Torres was shot dead at point-blank range Sunday night at a Chinese restaurant in Peru

An assassin calmly walks into a Chinese restaurant in San Juan de Lurigancho, a district in Lima, before he takes out his target with a single shot to the head

Jessica Farfan (left wearing black sweatshirt) is comforted by an unidentified person while her boyfriend David Socrates Cortijo Torres lays dead on the floor of a restaurant

The unidentified assailant then shot at Cortijo Torres, also know as 'Pollo Flaco' (Slim Chicken), who was seated just a couple of feet away from another couple dining in the restaurant.

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His girlfriend Jessica Farfan, 25, could be seen crying in horror with both of her hands covering her face immediately after Cortijo Socrates slumped to the ground.

Police witnesses said the suspect quickly walked out of the restaurant and sped away on motorcycle.

David Socrates Cortijo Torres (pictured) had a prior brush with the law in 2014 when he was caught in a string of cash register robberies as a member of the ‘Los Destructores’ [‘The Destroyers’] gang

Former gang member David Socrates Cortijo Torres (top left) is dining with his girlfriend Jessica Farfan before a man walked into the restaurant and shot him dead

Jessica Farfan screams in horror moments after her boyfriend was shot dead in the head

Authorities believe the killing could have been an act of revenge.

No arrests have been made.

According to Diario Correo, police sources revealed that Cortijo Torres had been arrested for his participation in 2014 in a string of robberies that targeted the cash registers of local businesses in the nearby seaside city of El Callao.